Here is what you're looking for. The folks at Kurt Kinetic have done parameterized power curves for many trainers. See the table referenced on this page. Somewhere on the KK site there is also a graph of these curves, I think.

Here is what you're looking for. The folks at Kurt Kinetic have done parameterized power curves for many trainers. See the table referenced on this page. Somewhere on the KK site there is also a graph of these curves, I think.